A set of luxury twisting towers in New York City is drawing the attention of billionaire buyers, including Amazon CEO Jeff Bezos and New Zealand's richest man.

The XI "The Eleventh" is a double-tower development that spans an entire city block in Chelsea, on Manhattan's west side. It will include 236 luxury residences and the first US location of Six Senses Hotels Resorts Spas.

Residents of the XI will have access to an 18,000-square-foot amenities club, including a 75-foot sunlit swimming pool with a hot tub and poolside cabanas, as well as the 45,000 square feet of wellness amenities at Six Senses.